JSOUP 请求JSON

JSOUP请求JSON

    Document doc = Jsoup
            .connect(Constant.DATA_URL)
            .header("Accept", "*/*")
            .header("Accept-Encoding", "gzip, deflate")
            .header("Accept-Language","zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3")
            .header("Content-Type", "application/json;charset=UTF-8")
            .header("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0")
            .timeout(10000).get();
    Element body = doc.body();
    JSONObject json = JSONObject.fromObject(body.text());

但是出现问题了，请求就报错：

    org.jsoup.UnsupportedMimeTypeException: Unhandled content type. Must be text/*, application/xml, or application/xhtml+xml. Mimetype=application/json;charset=UTF-8, URL=http://www.baidu.com/
        at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:600)
        at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:540)
        at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:227)
        at org.jsoup.helper.HttpConnection.get(HttpConnection.java:216)

没有指定类型。找了如下解决方案：

     Response res = Jsoup.connect(Constant.DATA_URL)
            .header("Accept", "*/*")
            .header("Accept-Encoding", "gzip, deflate")
            .header("Accept-Language","zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3")
            .header("Content-Type", "application/json;charset=UTF-8")
            .header("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0")
            .timeout(10000).ignoreContentType(true).execute();//.get();
    String body = res.body();
    JSONObject json = JSONObject.fromObject(body);

上面其实关键点在于：ignoreContentType(true) ，这个是忽略请求类型。建议用execute() 去执行，如果用get 去执行的话，返回来是一个 HTML  页面包裹的 JSON  ，你处理起来稍微有点费劲。而且你要处理换行，你看到有换行了吧， JSON  正确的格式是一行返回，多行的话转成 JSON  对象的时候就会报错。所以还是推荐用execute() 去执行。

不过我最后还是换做用 HttpConnection  来解决。

    InputStreamReader reader = null;
    BufferedReader in = null;
    try {
        URL url = new URL(Constant.DATA_URL);
        URLConnection connection = url.openConnection();
        connection.setConnectTimeout(1000);
        reader = new InputStreamReader(connection.getInputStream(), "UTF-8");
        in = new BufferedReader(reader);
        String line = null; // 每行内容
        StringBuffer content = new StringBuffer();
        while ((line = in.readLine()) != null) {
            content.append(line);
        }
        if (StringUtils.isNotBlank(content)) {
            String jsonStr = content.toString().replaceAll("\n", "");
            data = JSONObject.fromObject(jsonStr);
        }
    } catch (SocketTimeoutException e) {
        System.out.println("连接超时!!!");
    } catch (JSONException e) {
        System.out.println("网站响应不是json格式，无法转化成JSONObject!!!");
    } catch (Exception e) {
        System.out.println("连接网址不对或读取流出现异常!!!");
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                System.out.println("关闭流出现异常!!!");
            }
        }
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                System.out.println("关闭流出现异常!!!");
            }
        }
    }